Author: larry
Date: Wed Apr 5 16:30:06 2006
New Revision: 8565
Modified:
doc/trunk/design/syn/S03.pod
Log:
More clarification of how reduce is parsed.
Modified: doc/trunk/design/syn/S03.pod
==============================================================================
--- doc/trunk/design/syn/S03.pod (original)
+++ doc/trunk/design/syn/S03.pod Wed Apr 5 16:30:06 2006
@@ -300,9 +300,24 @@
argument as a scalar even if the aliased function would have parsed it
as a list:
- &infix:<dehash> ::= postcircumfix:<{}>;
+ &infix:<dehash> ::= postcircumfix:<{ }>;
$x = [dehash] $a,'foo','bar'; # $a<foo><bar>, not $a<foo bar>
+Note that, because a reduce is a list operator, the argument list to is
+evaluated in list context. Therefore the following would be incorrect:
+
+ $x = [dehash] %a,'foo','bar';
+
+You'd instead have to say one of:
+
+ $x = [dehash] \%a,'foo','bar';
+ $x = [dehash] %a<foo>,'bar';
+
+On the plus side, this works without a star:
+
+ @args = (\%a,'foo','bar');
+ $x = [dehash] @args;
+
=head1 Junctive operators
C<|>, C<&>, and C<^> are no longer bitwise operators (see L</Operator
